| Citation: | DU Xinlei, DONG Xingang, HUANG Likeng, et al. Fuel supply characteristics of powder fuel engine[J]. Journal of Aerospace Power, 2025, 40（5）：20230578 doi: 10.13224/j.cnki.jasp.20230578
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In view of the problem of reliable fluidization and quantitative adjustable transportation of powder fuel, the characteristics of powdered supply system based on piston-driven gas fluidization and transportation were studied. The influences of different piston driving forces, fluidization pressures and diameters of powder outlet throat on the fluidized transport characteristics of powder were analyzed experimentally. Experimental results showed that the system can stably feed powder under the set working conditions; there existed a critical value of piston driving force within the specified range. When the piston driving force was less than the critical value, the powder mass flow rate increased with the increase of piston driving force. When it exceeded the critical value, the piston driving force can be decoupled from the powder fluidization transport, and the powder flow rate had a linear relationship with the throat area of the powder out-let; the flow rate of fluidized gas increased and then decreased rapidly during the increase of driving force, and the solid-gas ratio of powder transportation was the maximum when the piston driving force reached the upper limit; increasing the fluidization pressure made the solid-gas ratio greatly reduce, which was not conducive to the effective utilization of gas source.
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